I recently installed a v3.9 and programed it with my config that defaults to the battery charge blade style. When powered on the indicator LEDs scroll really fast right off the top. It prompted me to look at the board to see if the R3 and R4 resistors were intact (and they were) but I noticed the L1 was missing and not bridged. Would this cause the problem I am seeing? I used the same blade with a board with a similar config, but it does have the L1 (although i did knock off C61 while soldering) and it seems to work fine. Do I need to bridge the L1 pads? I’m worried about knocking off more important components if I attempt and mess up.
Do you mean L2?
L1 is used in the voltage booster, which powers the amplifier, not the CPU.
The indicator LED tries to show how busy the CPU is, so fast ramps means it’s NOT busy.
(More information about that here: ProffieOS Documentation: Deciphering the Status LED) Not sure why this prompted you to check R3/R4, which are used to to measure battery voltage…
Ok, implications:
- The board will not work at all without L2. (Bridging may work)
- The sound will not work without L1. (You could bridge 5v-BATT+, but you would loose some sound volume.)
- The board may work fine without C61. (The 3.3v booster may become unstable and unable to handle high loads.)
Thanks for the info. I did mean L2. By indicator LEDs, I meant the LED’s on the pixel strip that show the battery voltage. Sorry, I should have been more clear. The board seems to be working otherwise. The missing C61 was a different board that seems to be fully functional. Not sure if you can tell from the photo. I have circled what I though was the missing L2 and the pads don’t looked to be bridged.
Looks like I was wrong about L1.
It only feeds VDDA which I think is primarily used for analog outputs, which aren’t really used.
You might be fine without L2.
So the battery level blade style not working is not a symptom of the missing L2? Then I guess I’m back at looking at the R3 and R4. Unless you think it could be anything else. If it is only the blade style not working I’m not too concerned, just wondering if there is a worse issue that should be looked into.
I have to admit, I am a novice with this hardware stuff. Soldering wires is about as much as I have accomplished so far. I don’t think I have the tools or skills to replace components; I’d just like to understand what is wrong. Thanks for your help.
I think I didn’t describe the problem well, so I have added a video.
It might be, I’m not sure.